You donot need to click mouse on login button rather enter button from keyboard wright if it is so then using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Data.OleDb; namespace { public partial class Form1 : Form { string ConnectionString = System.Configuration.ConfigurationSettings.AppSettings["dsn"]; OleDbCommand com; string str; object obj ; public Form1() { InitializeComponent(); } private void btn_login_Click(object sender, EventArgs e) { OleDbConnection con = new OleDbConnection(ConnectionString); con.Open(); str = "select count(*) from login where UserName=@UserName and Password =@Password"; com = new OleDbCommand(str, con); com.CommandType = CommandType.Text; com.Parameters.AddWithValue("@UserName", TextBox_user_name.Text); com.Parameters.AddWithValue("@Password", TextBox_password.Text); obj = com.ExecuteScalar(); if ((int)(obj) != 0) { lb1.Text = "WELLCOME :: " + TextBox_user_name.Text; } else { lb1.Text = "invalid user name and password"; } con.Close(); } private void Form1_Load(object sender, EventArgs e) { this.AcceptButton = btn_login; } } }
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